keep the current zone & create 1, 4, or 9 new zones; all called "legion" with different zone IDs.
Either 1 zone for each version.
1 zone for each difficulty regardless of version.
1 zone for each of the 10 difficulties.
reduce the size of the battlefield for each instance to increase the quantity that can be crammed into each zone.
stack the zones with as many 'instances' as you can cram into them.
V1VD will still end up with 30min waits in Asura, but the rest of us would be without a wait ever.
Zone ID is not the limiting factor for true instances, it's an issue of server resources. That won't do ***unless they add more physical hardware too.
They're talking about borrowing from the other servers that maintain true instances, such as omen or dynamis-d. Perhaps those aren't always at full capacity and the remainder can be used to fit in more ambuscades.